Flowers supposedly evolved during the cretaceous period.
Like many pieces of amber the one above has multiple inclusions, not only is there a flower but a hexapod and a myriapod.
Some scientific papers on flowers in amberPoinar, G.O.Jr., Buckley, R. & Chen, H. 2016. A primitive mid-Cretaceous angiosperm flower, Antiquifloris latifibris gen. & sp. nov., in Myanmar amber. Journal of the Botanical Research Institute of Texas, 10(1), 155-162.
Poinar, G.O.Jr. & Chambers, K.L. 2005. Palaeoanthella huangii gen. and sp. nov., an Early Cretaceous flower (Angiospermae) in Burmese amber. Sida, 21(4), 2087-2092.
Poinar, G.O.Jr., Chambers, K.L. & Buckley, R. 2007. Eoëpigynia burmensis gen. and sp. nov., an Early Cretaceous eudicot flower (Angiospermae) in Burmese amber. Journal of the Botanical Research Institute of Texas, 1(1), 91-96.
Poinar, G.O.Jr., Chambers, K.L. & Buckley, R. 2008. An early Cretaceous angiosperm fossil of possible significance in rosid floral diversification. Journal of the Botanical Research Institute of Texas, 2(2), 1183-1192.
Poinar, G.O.Jr., Chambers, K.L. & Wunderlich, J. 2013. Micropetasos, a new genus of angiosperms from mid-Cretaceous Burmese amber. Journal of the Botanical Research Institute of Texas, 7 (2), 745-750.
Our taxa list is based on the amazing work of Dr Andrew J. Ross who has prepared a newer updated list and kindly offers it for free download
Amber lovers and Paleos can dig up the latest updated version here:
https://www.nms.ac.uk/media/1154465/burmese-amber-taxa-v2017_2.pdf
